To minimize the grief of doing the math yourself, we averaged the horsepower between 3,000 and 6,000 rpm, then divided that into the cost of a pair of heads. Perfect fitment, good quality heads on a budget! ported and polished heads can also provide good results, but they may require more work to install and tune properly. very poorly packaged, opened it and there was no screen protection sheet between screen and keyboard. 165 cc Intake. These elements made the BOSS 302 a unique mill compared to what the rest of Detroit had to offer at the time. Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4 reach with flat gasket seat. Max effort class rule stuff runs over $2K. Building LS garbage? The heads are awesome and fit great! The Edelbrock E-Street cylinder heads offer American made quality and affordable performance. Production casting part numbers:
FLO-TEK Performance cylinder heads feature as-cast ports and are designed for entry-level street performance applications operating in the idle-to-5500 rpm range. For a better experience, please enable JavaScript in your browser before proceeding. The head bolts used on a Boss 302 were a flanged-style head bolt. Edelbrock E-Street cylinder heads are just the ticket. The 302 has a 9:1 compression ratio, while the 347 and 363 have 9.6:1 and 10.2:1, respectively. Autozone has a great price on these heads. good luck with that. The results of this test didnt really surprise me, except for one thing, reveals Holdener. from United States. So your wrong. The runners are as cast and a bit rough. Your email address will not be published. It features a forged dome piston to bring compression up to the original 11.0:1 compression ratio with the 64cc 186 casting fuelie heads. . All Edelbrock E-Street cylinder heads are assembled with manganese bronze valve guides, powder metal interlocking valve seats, and stainless steel one-piece valves with hardened valve tips. To conceive the BOSS 302, Ford had to develop a special forged piston with a significant dome that would reach deep into the 351C heads 64 67cc chambers. Because they didnt allow destroking [of an existing engine design] initially, both companies had to build actual displacements of five liters, explains Holdener. Typical rebuild, headers, Competition solid lifter cam, 1.73 Crane roller rockers. Renegade Street. Im sure you had over 400. 60 cc Chamber. These aluminum heads are assembled with the perfect match of components for outstanding, trouble-free performance. 500 max! THE FIRST SET I PURCHASED WERE LIKE THIS AND I INSTALLED WITHOUT CHECKING THEM. THAT IS UNACCEPTABLE IN MY BOOK. 02 intake/1. While the tunnel port wasnt a complete success, thats how the Boss heads came to be. The 68 J and F code heads show to be the same in my information. 010 runout and wouldnt come out of the head without a lot of force (we never took it out). My fault for not setting the intake on the engine to check my end gaps. The connecting rods began life as the same C3AE rod as the 289 HiPo but they had 3/8" bolts and they were spot faced instead of broached where the head of the bolt sits. THe new heads will have the same bolt-pattern as the original 6. They use a Cleveland style quench chamber and standard 302 Boss/351 Boss/351C/351 SVO valve train parts (will accept 2.19"/1.71" valves). PRO1 170 Ford Tech Sheet - H30. The J code 302-4V was only made in 68. If I wasnt on a time crunch, I would have returned these heads. This is the 2012-2013 BOSS 302 cylinder head casting, M-6050-M50 and M-6049-M50 (shown), which really is a different casting of an improved 356 aluminum alloy (versus 319 with base Coyote heads) with CNC-machined ports and chambers. There are plenty of them lying around used and new-old-stock. The result was a powerful 290-horse factory screamer with peak street power coming in around 6,000 rpm. Thesecret to a long life stroker is to add wieght to the crank so you can exterally balance @ 28 oz. This is where you must spend the money. Required fields are marked *. If you are looking for a set of World aluminum heads, you can find them at Bill Mitchell Products. These all-cast heads are designed for hydraulic flat tappet and hydraulic roller cam engines with hefty intake runners, stainless steel valves, Viton seals, and dual springs. 70 Boss 302 intake 2.19 / exhaust 1.71. The power numbers are so close that if we had tested these heads in a typical street car, it's doubtful we would have seen much of a difference in performance among the middle four heads. saving. I'd have to look through some old books, but I think it took 3 heads to get 1, although it may have been 2. Those of you who understand the BOSS 302 know Ford fitted these engines with a 780 cfm Holley but not necessarily because thats what they needed. 1.290 in Spring. Henry Ford II wasnt going to have it any other way. I might like to put it back together this summer with your fluid damper a 600 holley carb and maybe your electronic distributor . VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. And, he decided to make that happen. BluePrint Engines stand in front of the class, offering both performance and cost-conscious enthusiasts a powerful alternativeMuscle Series cylinder heads. Brand New. Im extremely disappointed in this blog.. 10 years????? As you can see from these numbers, the Cleveland-style Boss 302 cylinder heads offer significantly more airflow at each valve opening point over the DZ 302's fuelie heads. Years ago there was a six cylinder weight break for the late model classes at one of the local dirt tracks that I would frequent. Alum. A factory high-rise dual-plane intake manifold was used, with one part not period-correct. Other Intakes >> Application. Both companies decided to develop a 302 combination via the previously mentioned four-inch bore and three-inch stroke. For a better experience, please enable JavaScript in your browser before proceeding. Are you looking for a set of entry-level street performance heads for your modern street rod, musclecar, or truck? The BOSS 302 heads are known as "Cleveland style" heads as they are based on the head designed for the 351 Cleveland engine. Bought these and compared to the other (PC). The problem is the oil drain back passage has very poor alignment with the block and the valves are sitting in a pool of oil. my signature linesnot really directed at anyone in particular.. There are many different types of cylinder heads for Ford 302 engines, so it is difficult to make a definitive conclusion about them. We will safeguard your e-mail and only send content you request. Tech-Sheet. But for perhaps a majority of enthusiasts, this evaluation may be too simplistic. crank, offset-grinding it to a smaller crankpin diam. These heads are always perfect, but could use a little bowl work thanks team SUMMIT. The Fora platform includes forum software by XenForo. And really, its a difference in the philosophy behind these two motors. If you had the right pistons, you could use 351C 2V heads which are cheap and plentiful and don't have the low end port velocity issues 22GT described. I also figured that the DZ 302s smaller heads, with better port velocity and more compression, would make more peak torque. Boss 302 - 1970 Boss. It was honestly a guess on my part and the Tech had no additional information or opinion to offer. Rugged, ribbed internally and externally, with a large water capacity and excellent breathing characteristics. WITH THE STIFFER SPRINGS I REALIZED THE PEDESTAL MOUNT ROCKERS WOULD MOST LIKE FAIL SO I MACHINED THE PEDESTAL PADS, DRILLED AND TAPPED AND INSTALLED HELI COILS FOR ROCKER STUDS. Renegade Street. It's important to note that this was the only head in our test that required its own separate valvetrain. Build your own custom newsletter with the content you love from EngineLabs, directly to your inbox, absolutely FREE! The modern combustion chamber designs improve the combustion process and larger than stock intake and exhaust ports move more air through your engine for improve efficiency. Typically these are seen in three different versions as shown. View Details. What type of heads fit a Boss 302 block? You can see how the valves are canted in this picture. They feature high-flow ports and steel alloy intake and exhaust valve seats installed (they do require a competition valve job and bowl blending). Cylinder Head. As you can see from these numbers, the Cleveland-style Boss 302 cylinder heads offer significantly more airflow at each valve opening point over the DZ 302s fuelie heads. The rocker studs are 7/16, not 3/8. Heads are sold individually. The block is a 1980 302 Winsor. The Ford Racing X307 head is not the casting that comes on the Boss 302 crate engine, but its affordable price made it a natural choice for this test. Both these motors were factory-rated at the same 290 horsepower, but that number is suspect, says Holdener. Cylinder Head. Bored out 70-thousandths to 310 cubic inches and with a laundry list of. There was a guy named CJ Batten who would cut up 3 boss 302 heads and put them on a 300 IL6.The one I remember was on in a rail type dragster. These are perfect for a street build and the price is outstanding!!. Its biggest weakness may be the price. it boots up ok but not as fast as my other i5 laptop. one of the hotrod magazines did an article on the combo back in the 70's. These heads feature A356 aluminum castings that are heat-treated to T-6 specs for superior casting strength and quality. But as others have mentioned there are modifications that must be done to make it work. But for the rest of us, choosing a cylinder head might be a complex algorithm of price, power, brand loyalty, ease of installation, head bolt size, and maybe even shoe size if you're that compulsive. Experimental Part . Yates? high power capabilities. That may or may not make your ultimate choice any easier, but if so, you can thank us later. To pull this off, we needed a durable mule, so we chose Ford Racing's Boss 302 345-hp crate engine that comes with a set of aluminum heads actuated by a .480-inch lift B303 hydraulic. . Enter Fords development of an all-new 351ci engine with poly-angle valve heads and tight-fisted wedge heads destined for a 1970 introduction. It didnt conform to corporate protocol and invented the muscle car in its 1964 GTO. Great option. Back in the day, there was all kinds of speculation that they made more than 400 horsepower. THE NEXT ISSUE WAS VALVE SPRING INSTALL HEIGHT. However, there are a few notable differences between the Coyote in the F-150 and the Coyote in the Mustang. $1,692.99. Would modifying the heads bring down the value of the heads? I figured the Boss would make peak power. So Im into changing springs, retainers, locators, etc. And like the others mention, it was C.J. we all have our shortcomings. This page last updated: February 3, 2022. Im trying to build my 289 on a budget and saw a pair of Boss 302 heads online for $400 and thought why not. Im looking to build an engine that produces 300ish hp. Not sure about the 5089. The RHS headsproduced the next-closest average horsepower and torque, with the Edelbrock and Ford heads very close behind. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! Boss 302 blocks are used all the time for Windsor headed performance buildups! They dropped off after that. Was running 850 dbl pump Holley with 4:56 gears, and I was running 12:20s at over 112 mph in the quarter. We discovered this was a 1969-70 BOSS 302 head modified for use on a 351C. It would make a nice high rpm engine that was pretty soft on the lower end where you spend the most time. were designed to be 1-for-1 replacements for Boss 351 cylinder heads. Gurney Eagle : Gurney Eagle race heads : Application. 2. Great top end with these heads also. The Cleveland heads can fit a 302 with the appropriate water passage mods and shouldered bolts to compensate for the bolt hole difference. 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The Fora platform includes forum software by XenForo. So the induction system is kind of a toss-up. Currently working on a 1970 Mach 1 project. See the top reviewed local exterior and siding contractors in Hohenthann, Bavaria, Germany on Houzz. This minor tune-up would really improve the flow curve and add a measurable amount of torque. Marvin Shaw built us some nice HP heads for our later 1989 Super Stock Mustang driven by Charlie Ford who set 1/8th mile record under 6 seconds in 89/90 . But, I just came across this website and happened to ask about B. Sizemor's 6. Seems to me that if you get the right kit (ie correct wrist pin centering, rod length, etc), you should have no problem.. aliases: Bossssssman, bosscars, old fart, chat dawg, hey you. BluePrint Engines HP9009: Cylinder Head, Assembled, Aluminum, 60cc Combustion Chamber, Square Port, Ford, 289, 302, 351, Stud Mount, Each Welcome to a new class of high performance cylinder headsBluePrint Muscle Series! The Ford heads did well during the testing, making a peak of 362 hp. These heads feature A356 aluminum castings that are heat-treated to T-6 specs for superior casting strength and quality. I used them with a Comp Cams 274XE cam and a QFT 600cfm carb. Still have lots of racing Boss and Hipo parts. This is my first engine build, let me know if Im doing it all wrong. I remember reading about it in some magazine and I saw it on another forum recently. Alum. I personally know several guys with Boss 302s that have been secretly stroked to 347. The cylinder head is bolted to the engine block and sits above the pistons. No more dyno there. When you do that, you can see that the TFS head did substantially better than all the other heads above about 4,400 rpm. . legend . Single angle amateur valve job and it was pretty sad looking At this point I called edelbrock and they gave me the song and dance so I called Jegs and they issued a return. Feb 19, 2016. Especially for the price, I would buy them again in a heartbeat. Expensive mistake. It was 351C heads, 3 of them, cut up into 6 pieces, then furnanced blazed. Can you further help me with where to buy this? The BOSS 302 Registry is not affiliated with the Ford Motor Company. And you'd have to replace the factory two-piece valves which are known to come apart randomly for no reason. Even the stock cam should peek higher than 5500 rpm. We should stress that during testing we optimized each set of heads for timing and jetting and then ran the engine for two near identical runs, which were then averaged to come up with the final power numbers. Some of the guys were running ford 300 six cylinders with good success. BluePrint Engines Ford 302 C.I.D. I installed these on a factory 302 HO in my 94 Mustang. The supply chain issues are eliminating a lot of choices. Im trying to leave this pretty much as is, until I get a few good drives in. 58 cc Chamber. So, a big head, lots of camshaft, an aluminum intake, and a Holley four-barrel. Not true! Exhaust - 1.72 inches. A stock 1970 Boss 302-spec solid, flat-tappet cam was used and offered a tad over .500-inch lift and 228 degrees of duration at 0.050.